Definition of "myoclonus" []

• A sudden twitching of muscles or parts of muscles, without any rhythm or pattern, occurring in various brain disorders. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Once called myoclonus, PLMS causes you to involuntarily flex and extend your legs while sleeping - without being aware you're doing it."
• "When Liz runs the nocturnal myoclonus leg wires, the banker has an erection."
• "And once again, I deeply and sincerely apologize for having had the impertinence to permit my myoclonus and fasciculations and other neurological symptoms of Lyme to resolve in a manner and through a physician that didn't meet with your express approval."